Vapor Barrier For Bathroom Walls

Interior bathroom and kitchen walls for example are areas where there is.

Vapor barrier for bathroom walls.

A vapor or moisture barrier is a layer of protection that is designed to act as a waterproof shield helping to keep condensation away from wood insulation and other mold prone materials that are located behind the drywall. In existing spaces oil based paints or vapor barrier latex paints offer an effective moisture barrier. If the tub shares this exterior wall i would put vapor barrier behind it if you can as the plastic tub surround will not give you a vapor barrier i don t think. The vapor barrier should be on the inside between the insulation and drywall.

The inner surface in colder climates and the outer surface in hot humid climates. There is no need to vapor barrier the non exterior walls. Vapor barriers are usually best installed on the side of the wall that experiences the hotter temperature and moister conditions. Vapor retarders are there to slow the diffusion of moisture so the building inspector is off base argues senior editor martin holladay.